Weather in Galveston Island: December
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Average day temperature: | 63.5°F |
| Average night temperature: | 58.4°F | |
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Sea water temperature: | 63.2°F |
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Number of sunny days: | 9 days |
| Day length: | 10.3 - 10.4 hours | |
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Number of rainy days: | 2 days |
| Precipitation totals: | 0.8 in. | |
| more information | ||
forecast
| Galveston Island |
temperature
| Galveston Island |
Air temperature in December, °F
The highest day temperature during December of 2025 was 73°F. At the same time the lowest night temperature was 36°F. Daily and nightly averages during December were 62.6°F and 57.6°F.
Sea water temperature in Galveston Island in December, °F
The average sea water temperature in December of 2025 was 63.4°F. The highest and lowest sea temperatures during the month were 69.4°F and 59.7°F.
Number of sunny, partly cloudy and cloudy days in December is almost equal.
Precipitation total in December, in.
Precipitation total value in Galveston Island in December is 0.8 in. Other months of the year show relatively similar values.
The average wind speed value in December is 10.5 mph
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in December is: 5.0.
Best time for vacation in Galveston Island
Galveston Island on a weather map
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